Normal Operation - Vehicles not equipped with a Circuit Deactivation Ignition Module (CDIM)
WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The ignition switch receives fused battery voltage from Body Control Module (BCM) permanent voltage bus through fuse 28 (15A). The ignition switch distributes the voltage to the BCM internal logic, PCM and Brake Shift Interlock Actuator (BSIA).